Multi-contact adhesion detection and auxiliary disconnection circuit and elevator power supply device

Abstract

The embodiment of the utility model provides a multi-contact adhesion detection and auxiliary disconnection circuit and an elevator power supply device, and belongs to the technical field of relay adhesion. The circuit comprises a first contactor, a first control switch coil, a second contactor, a bypass switch, a second contactor switch, an alarm, a power supply part and a bus switch, one end of the first contactor is connected with the power supply part, and the other end of the first contactor is grounded; one end of the first control switch coil is connected with one end of the first contactor, and the other end of the first control switch coil is connected with the other end of the first contactor; one end of the second contactor is connected with the other end of the first control switch coil; one end of the bypass switch is connected with the other end of the second contactor; the bus switch is connected with the other end of the bypass switch; one end of the second contactor switch is connected with the power supply part; and one end of the alarm is connected with the other end of the second contactor switch, and the other end of the alarm is grounded.

Description

Technical Field

[0001] The utility model relates to the technical field of relay adhesion, in particular to a multi-contact adhesion detection and auxiliary disconnection circuit and an elevator power supply device. Background Art

[0002] Relays have the function of controlling the on and off of strong current circuits with weak current, and can be used in most smart devices. However, in some cases, the relay may not be able to disconnect the circuit in time, causing adhesion, leading to safety hazards such as leakage and short circuit. The existing contact detection circuit has a complex principle and structure, high production cost, requires the use of software and hardware, is also limited by the contact timing, and cannot effectively disconnect the load when the contact is stuck, etc., which seriously limits its actual use. Utility Model Content

[0003] The purpose of the embodiment of the utility model is to provide a multi-contact adhesion detection and auxiliary disconnection circuit and an elevator power supply device, which solves the problem that the load cannot be effectively disconnected when the contacts are stuck, thereby improving the control performance.

[0004] In order to achieve the above-mentioned object, the embodiment of the utility model provides a multi-contact point adhesion detection and auxiliary disconnection circuit, the circuit comprising:

[0005] Power Supply Department;

[0006] A first contactor, one end of the first contactor is connected to the power supply unit, and the other end of the first contactor is grounded;

[0007] A first control switch coil, one end of the first control switch coil is connected to one end of the first contactor, and the other end of the first control switch coil is connected to the other end of the first contactor;

[0008] a second contactor, one end of the second contactor being connected to the other end of the first control switch coil;

[0009] a bypass switch, one end of which is connected to the other end of the second contactor;

[0010] A bus switch connected to the other end of the bypass switch;

[0011] a second contactor switch, wherein one end of the second contactor switch is connected to the power supply unit;

[0012] An alarm, one end of which is connected to the other end of the second contactor switch, and the other end of which is grounded.

[0013] Optionally, the circuit includes a time delay device, one end of the time delay device is connected to one end of the bypass switch, and the other end of the time delay device is connected to one end of the second contactor.

[0014] Optionally, the circuit includes a start button, and one end of the start button is connected to the power supply unit.

[0015] Optionally, the circuit includes a stop button, one end of the stop button is connected to the other end of the start button, and the other end of the stop button is connected to one end of the first contactor.

[0016] Optionally, the circuit includes a holding switch, one end of the holding switch is connected to one end of the start button, and the other end of the holding switch is connected to the other end of the start button.

[0017] Optionally, the circuit comprises an auxiliary disconnect switch, wherein the auxiliary disconnect switch is connected to a bus switch, and the bypass switch is connected between the bus switch and the auxiliary disconnect switch.

[0018] Optionally, when the current of the circuit is in an alternating current state, the circuit includes:

[0019] a rectifier, one end of the rectifier being connected to one end of the bypass switch, and the other end of the rectifier being connected to the other end of the second contactor;

[0020] A capacitor, one end of which is connected to the other end of the bypass switch, and the other end of which is connected to the other end of the first control switch coil;

[0021] A diode, one end of the diode is correspondingly connected to one end of the bus switch, and the other end of the diode is correspondingly connected to the third end of the bypass switch.

[0022] On the other hand, the utility model also includes an elevator power supply device, which includes a power supply, the circuit as described above, and a busbar, wherein the power supply is connected to the circuit, and the busbar is also connected to the circuit.

[0023] Through the above technical solution, the first contactor is the contactor to be detected, the bus switch is connected to the first contactor, the bus switch is composed of multiple normally open switches, the first control switch coil is the synchronous detection control coil of the detected contact, the second contactor is connected to the second contactor switch, the second contactor is an auxiliary disconnection contactor, the second contactor switch is a normally open switch, the bypass switch is connected to the first control switch coil, the bypass switch is a plurality of contact adhesion detection contacts, the bypass switch is a normally closed switch, and is connected to the plurality of bus switches accordingly. Under normal circumstances, the power supply unit supplies power to the first control switch coil, the first control switch coil is energized, the first control switch coil and the first contactor act synchronously, then the bypass switch is disconnected at the same time, at this time the second contactor cannot be energized, and the alarm does not display the alarm function; when the first contactor action instruction ends, the first control switch coil loses power, and the bypass switch is closed at the same time. If the bus switch of the corresponding first contactor has contact adhesion, the second contactor in the circuit will be disconnected, and the second contactor switch will be triggered at the same time, so that the second contactor switch is closed, and the alarm is triggered. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings are used to provide a further understanding of the embodiments of the present utility model and constitute a part of the specification. Together with the following specific implementations, they are used to explain the embodiments of the present utility model, but do not constitute a limitation on the embodiments of the present utility model. In the accompanying drawings:

[0025] Figure 1 It is a framework diagram of a multi-contact adhesion detection and auxiliary disconnection circuit according to an embodiment of the utility model;

[0026] Figure 2 It is a framework diagram of a multi-contact adhesion detection and auxiliary disconnection circuit according to an embodiment of the utility model;

[0027] Figure 3 It is a framework diagram of a multi-contact adhesion detection and auxiliary disconnection circuit according to an embodiment of the utility model;

[0028] Figure 4 It is a DC circuit diagram of a multi-contact adhesion detection and auxiliary disconnection circuit according to one embodiment of the utility model;

[0029] Figure 5 It is an AC circuit diagram of a multi-contact adhesion detection and auxiliary disconnection circuit according to an embodiment of the utility model.

[0030] Description of Reference Numerals

[0031] 1. First contactor 2. First control switch coil

[0032] 3. Second contactor 4. Bypass switch

[0033] 5. Second contactor switch 6. Alarm

[0034] 7. Bus switch 8. Delay device

[0035] 9. Hold switch 10. Start button

[0036] 11. Stop button 12. Auxiliary disconnect switch

[0037] 13. Rectifier 14. Capacitor

[0038] 15. Diode 16. Delay switch DETAILED DESCRIPTION

[0039] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0040] In the embodiments of the present application, unless otherwise specified, directional words such as "up, down, top, bottom" are usually used with reference to the directions shown in the drawings or are used to describe the relative positional relationships of components in the vertical, perpendicular or gravity direction.

[0041] In addition, if there are descriptions involving "first", "second", etc. in the implementation methods of this application, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various implementation methods can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0042] like Figure 1 As shown, Figure 1 This is a framework diagram of a multi-contact adhesion detection and auxiliary disconnection circuit according to an embodiment of the present utility model. Figure 1It can be seen that the circuit includes: a first contactor 1, a first control switch coil 2, a second contactor 3, a bypass switch 4, a second contactor switch 5, an alarm 6, a power supply and a bus switch 7, wherein one end of the first contactor 1 is connected to the power supply, and the other end of the first contactor 1 is grounded; one end of the first control switch coil 2 is connected to one end of the first contactor 1, and the other end of the first control switch coil 2 is connected to the other end of the first contactor 1; one end of the second contactor 3 is connected to the other end of the first control switch coil 2; one end of the bypass switch 4 is connected to the other end of the second contactor 3; the bus switch 7 is connected to the other end of the bypass switch 4; one end of the second contactor switch 5 is connected to the power supply; one end of the alarm 6 is connected to the other end of the second contactor switch 5, and the other end of the alarm 6 is grounded. The first contactor 1 is the contactor to be detected, the bus switch 7 is connected to the first contactor 1, the bus switch 7 is composed of multiple normally open switches, the first control switch coil 2 is the synchronous detection control coil for the detected contacts, the second contactor 3 is connected to the second contactor switch 5, the second contactor 3 is an auxiliary disconnecting contactor, the second contactor switch is a normally open switch, the bypass switch 4 is connected to the first control switch coil 2, the bypass switch 4 is a plurality of contact adhesion detection contacts, the bypass switch 4 is a normally closed switch, and is correspondingly connected to multiple bus switches 7. Under normal circumstances, the power supply unit supplies power to the first control switch coil 2, the first control switch coil 2 is energized, the first control switch coil 2 and the first contactor 1 act synchronously, and the bypass switch 4 is disconnected at the same time. At this time, the second contactor 3 cannot be energized, and the alarm 6 does not display the alarm function; when the action instruction of the first contactor 1 ends, the first control switch coil 2 loses power, and the bypass switch 4 is closed at the same time. If the bus switch 7 of the corresponding first contactor 1 has contacts sticking, the second contactor 3 in the circuit will be disconnected, and the second contactor switch 5 will be triggered at the same time, so that the second contactor switch 5 is closed, triggering the alarm 6.

[0043] In this embodiment, if Figure 2 As shown, the circuit also includes a delayer 8, one end of the delayer 8 is connected to one end of the bypass switch 4, the other end of the delayer 8 is connected to the other end of the second contactor 3, the delayer 8 is a delay relay, the delayer 8 and the delayer switch 16 are connected to each other, one end of the delayer switch 16 is connected to the other end of the second contactor switch 5, the other end of the delayer switch 16 is connected to one end of the alarm, the delayer 8, the delayer switch 16, the second contactor switch 5 and the alarm 6 form an alarm circuit, when there is contact adhesion, the first contactor switch 5 and the delayer switch 16 are energized to form a closed circuit, the delayer 8 will delay for 20 seconds, and the alarm 6 will continue to alarm for 20 seconds.

[0044] In this embodiment, the circuit further includes a start button 10 and a stop button 11, wherein one end of the start button 10 is connected to the power supply unit, one end of the stop button 11 is connected to the other end of the start button 10, and the other end of the stop button 11 is connected to one end of the first contactor 1. The circuit starts working when the start button 10 is pressed, and if multiple contacts are stuck, the alarm 6 sounds an alarm, and the circuit stops working when the stop button 11 is pressed.

[0045] In this embodiment, the circuit further includes a holding switch 9, one end of the holding switch 9 is connected to one end of the start button 10, and the other end of the holding switch 9 is connected to the other end of the start button 10. When the start button 10 is pressed, the holding switch 9 plays a role of maintaining the circuit after the circuit is started.

[0046] In this embodiment, considering that the alarm 6 keeps alarming when contact adhesion occurs, the way to disconnect the circuit can be a variety of ways known to those skilled in the art. In one embodiment of the utility model, the circuit includes an auxiliary disconnect switch 12, the auxiliary disconnect switch 12 is connected to the bus switch 7, the auxiliary disconnect switch 12 is a plurality of normally closed switches, the bypass switch 4 is connected between the bus switch 7 and the auxiliary disconnect switch 12, and the bypass switch 4, the bus switch 7 and the auxiliary disconnect switch 12 are connected correspondingly. When contact adhesion occurs, the first control switch coil 2 loses power, the bypass switch is closed correspondingly, so that the second contactor 3 is energized, the second contactor switch 5 and the delay switch 16 are attracted, and the alarm 6 is triggered. The alarm time lasts for 20s. At this time, the auxiliary disconnect switch 12 is disconnected, thereby protecting the output.

[0047] In this embodiment, when the current is an alternating current, such as Figure 3As shown, the circuit further includes a rectifier 13, a capacitor 14 and a diode 15, wherein one end of the rectifier 13 is connected to one end of the bypass switch 4, and the other end of the rectifier 13 is connected to the other end of the second contactor 3; one end of the capacitor 14 is connected to the other end of the bypass switch 4, and the other end of the capacitor 14 is connected to the other end of the first control switch coil 2; one end of the diode 15 is correspondingly connected to one end of the bus switch 7, and the other end of the diode 15 is correspondingly connected to the third end of the bypass switch 4. The function of the rectifier 13 is to convert AC current into DC current. Under normal circumstances, the power supply unit supplies power to the first control switch coil 2, the first control switch coil 2 is energized, the first control switch coil 2 and the first contactor 1 act synchronously, and the bypass switch 4 is disconnected at the same time. At this time, the second contactor 3 cannot be energized, and the alarm 6 does not display the alarm function; when the action instruction of the first contactor 1 ends, the first control switch coil 2 loses power, and the bypass switch 4 is closed at the same time. If the bus switch 7 of the corresponding first contactor 1 has contacts sticking, the second contactor 3 in the circuit will be disconnected, and the second contactor switch 5 will be triggered at the same time, so that the second contactor switch 5 is closed, triggering the alarm 6.

[0048] Specifically, in one embodiment of the present invention, Figure 4 As shown, Figure 4 It is a DC multi-contact adhesion detection and auxiliary disconnection circuit, in which KM1 is the first contactor 1, KA1 is the first control switch coil 2, KM2 is the second contactor, SB1 is the start button 10, SB2 is the stop button 11, KA1 normally open switch is the hold switch 9, KM2 normally open switch is the second contactor switch 5, KT1 is the delay 8, KT1 normally closed switch is the delay switch 16, LH is the indicator light, BZ is the buzzer, LH and BZ are the alarm 6, KM1-1 to KM1-N normally open switches are bus switches 7, KM2-1 to KM2-N normally closed switches are auxiliary disconnect switches 12, and KA1-1 to KA1-N normally closed switches are bypass switches.

[0049] In addition, the utility model also includes an elevator power supply device, which includes a power supply, the circuit as described above, and a busbar, wherein the power supply is connected to the circuit, and the busbar is connected to the circuit.

[0050] Through the above technical solution, under normal circumstances, the power supply unit supplies power to the first control switch coil 2, the first control switch coil 2 is energized, the first control switch coil 2 and the first contactor 1 act synchronously, and the bypass switch 4 is disconnected at the same time. At this time, the second contactor 3 cannot be energized, and the alarm 6 does not display the alarm function; when the action instruction of the first contactor 1 ends, the first control switch coil 2 loses power and the bypass switch 4 is closed at the same time. If the bus switch 7 of the corresponding first contactor 1 has contacts sticking, the second contactor 3 in the circuit will be disconnected and the second contactor switch 5 will be triggered, so that the second contactor switch 5 is closed and the alarm 6 is triggered.

[0051] The optional implementation modes of the utility model examples are described in detail above in conjunction with the accompanying drawings. However, the implementation modes of the utility model are not limited to the specific details in the above implementation modes. Within the technical concept of the implementation modes of the utility model, various simple modifications can be made to the technical solutions of the implementation modes of the utility model. These simple modifications all belong to the protection scope of the implementation modes of the utility model.

[0052] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the various possible combinations of the embodiments of the present utility model will not be described separately.

[0053] In addition, various different embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed in the embodiments of the present invention.

Claims

1. A multi-contact adhesion detection and auxiliary disconnection circuit, characterized in that: The circuit comprises: Power Supply Department; A first contactor, one end of the first contactor is connected to the power supply unit, and the other end of the first contactor is grounded; A first control switch coil, one end of the first control switch coil is connected to one end of the first contactor, and the other end of the first control switch coil is connected to the other end of the first contactor; a second contactor, one end of the second contactor being connected to the other end of the first control switch coil; a bypass switch, one end of which is connected to the other end of the second contactor; A bus switch connected to the other end of the bypass switch; a second contactor switch, wherein one end of the second contactor switch is connected to the power supply unit; An alarm, one end of which is connected to the other end of the second contactor switch, and the other end of which is grounded.

2. The circuit according to claim 1, characterized in that The circuit includes a time delay device, one end of which is connected to one end of the bypass switch, and the other end of which is connected to one end of the second contactor.

3. The circuit according to claim 1, characterized in that The circuit comprises a start button, one end of which is connected to the power supply unit.

4. The circuit according to claim 3, characterized in that The circuit includes a stop button, one end of the stop button is connected to the other end of the start button, and the other end of the stop button is connected to one end of the first contactor.

5. The circuit according to claim 4, characterized in that The circuit includes a holding switch, one end of the holding switch is connected to one end of the start button, and the other end of the holding switch is connected to the other end of the start button.

6. The circuit according to claim 1, characterized in that The circuit includes an auxiliary disconnect switch connected to a bus switch, and the bypass switch is connected between the bus switch and the auxiliary disconnect switch.

7. The circuit according to claim 1, characterized in that When the current of the circuit is in an alternating current state, the circuit comprises: a rectifier, one end of the rectifier being connected to one end of the bypass switch, and the other end of the rectifier being connected to the other end of the second contactor; A capacitor, one end of which is connected to the other end of the bypass switch, and the other end of which is connected to the other end of the first control switch coil; A diode, one end of the diode is correspondingly connected to one end of the bus switch, and the other end of the diode is correspondingly connected to the third end of the bypass switch.

8. An elevator power supply device, comprising a power supply, a circuit as claimed in any one of claims 1 to 7, and a busbar, wherein the power supply is connected to the circuit, and the busbar is connected to the circuit.

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